Refitting Ships
Older ships with less advanced technology are often improved and brought in line with newer vessels by refitting them; ...
There are two different types of refit that can be used. Major refits cover changes in power plant, manoeuvre or jump drive, as well as changes to spinal mounts or launch facilities (such as launch tubes). ...
Armour and other parts of the ship integral to the hull (such as configuration or reinforced structure) cannot be changed under any refit. Those items covered under a major refit cannot be increased in size though they may be reduced. Other components may be increased in size if there is tonnage available. ...